Cu-Doped Porous Carbon Derived from Heavy Metal-Contaminated Sewage Sludge for High-Performance Supercapacitor Electrode Materials.
Zhouliang TanFeng YuLiu LiuXin JiaYin LvLong ChenYisheng XuYulin ShiXuhong GuoPublished in: Nanomaterials (Basel, Switzerland) (2019)
In this paper, we report a complete solution for enhanced sludge treatment involving the removal of toxic metal (Cu(II)) from waste waters, subsequent pyrolytic conversion of these sludge to Cu-doped porous carbon, and their application in energy storage systems. The morphology, composition, and pore structure of the resultant Cu-doped porous carbon could be readily modulated by varying the flocculation capacity of Cu(II). The results demonstrated that it exhibited outstanding performance for supercapacitor electrode applications. The Cu(II) removal efficiency has been evaluated and compared to the possible energy benefits. The flocculant dosage up to 200 mg·L-1 was an equilibrium point existing between environmental impact and energy, at which more than 99% Cu(II) removal efficiency was achieved, while the resulting annealed product showed a high specific capacity (389.9·F·g-1 at 1·A·g-1) and good cycling stability (4% loss after 2500 cycles) as an electrode material for supercapacitors.
Keyphrases
- metal organic framework
- sewage sludge
- heavy metals
- aqueous solution
- solid state
- anaerobic digestion
- highly efficient
- quantum dots
- microbial community
- risk assessment
- reduced graphene oxide
- municipal solid waste
- wastewater treatment
- health risk assessment
- carbon nanotubes
- health risk
- drinking water
- climate change
- smoking cessation
- molecular dynamics simulations
- transition metal